This post may contain affiliate links, which help keep this content free. (Full disclosure)
I’ve made this low carb cauliflower casserole probably a dozen times in the past few weeks. I still have yet to get sick of it! If there’s one weeknight recipe from the blog that I’m hoping you’ll try, it’s this one. Everyone I’ve shared it with has fallen in love with it!
Some people have been complaining lately that cauliflower has gotten expensive, apparently due to a shortage. I feel very fortunate that in my area this has not been the case (thank you, Trader Joe’s!), because I am so in love with this versatile veggie. A miracle veggie, really, if you ask me. You can roast it, make soup with it, replace mashed potatoes, make quesadillas, and so much more. There are endless unique things you can do with it, but one of my favorites is to incorporate it into casseroles. They have that “comfort food” factor without being carb heavy.
This low carb cauliflower casserole is my favorite one yet. It’s brimming with layers of crisp-tender cauliflower, smoky ground beef mixed with marinara sauce, gooey melted cheese, and aromatic fresh basil. It’s comfort food at its finest. In the middle of winter, it’s just what I’m craving.
I love how easy this recipe is to throw together. You can easily eyeball the quantities or be off on the timing, and it doesn’t matter if you estimate this or that. It will still turn out amazing. The ingredients are very simple and versatile, and you probably have most of them on hand.
You could easily make substitutions in this recipe if you need to. Ground chicken or turkey works just fine instead of the beef. And if you have some other veggies on hand, they can stand in for the cauliflower. (For the record, in my opinion the cauliflower is the best, but you can swap it out if you must.) I know it’s called low carb cauliflower casserole, but that doesn’t mean you can’t mix it up a bit! One of my favorite variations is using a mixture of beef and turkey for the meat, paired with a combination of broccoli and cauliflower for the veggies.
By the way, if you’re looking for a comfort meal that’s freezer friendly, you’ll want to save this low carb cauliflower casserole recipe. I’ve done it a few times and it works perfectly! If you line the pan with foil before cooking, you can just freeze it right in the pan. Then, once it’s hardened, take it out by grabbing the foil edges. Wrap the top in more foil, and finish with plastic wrap. The wrapping will avoid freezer burn, and the foil means you can throw it in the oven straight from the freezer – so convenient!
Low Carb Cauliflower Casserole with Beef Marinara (Gluten-free):
Pin it to save for later!
More Low Carb Recipes To Love
Low Carb Cauliflower Casserole with Beef Marinara (Gluten-free)
Click underlined ingredients to buy them!
Please ensure Safari reader mode is OFF to view ingredients.
RECIPE TIPS in the post above! VIDEO + nutrition info + recipe notes below!
Preheat the oven to 400 degrees F (204 degrees C). Lightly grease a round 9 in (23 cm) or square 9x9 in (23x23 cm) casserole dish (line with foil if desired).
Toss the cauliflower with olive oil. Sprinkle lightly with sea salt and black pepper. Roast for 15-20 minutes, stirring halfway through, until crisp-tender.
Meanwhile, cook the onion in a skillet for 8-10 minutes over medium-low heat, until translucent and slightly browned.
Add the ground beef. Increase heat to medium-high. Cook for about 8-10 minutes, breaking apart with a spatula, until browned.
Stir in the garlic, marinara sauce, diced tomatoes, and half of the fresh basil. Season with sea salt and black pepper to taste. Cook for 2 minutes, until heated through.
Pour the tomato meat sauce over the cauliflower. Sprinkle with shredded mozzarella cheese. Bake for 8-10 minutes, until the cheese bubbles. Top with the remaining fresh basil ribbons.
Nutrition info will vary slightly depending on the brand of marinara sauce.
Serving size: 3/4 cup
NUTRITION INFORMATION PER SERVING
Where does nutrition info come from? Nutrition facts are provided as a courtesy, sourced from the USDA Food Database. You can find individual ingredient carb counts we use in the Low Carb & Keto Food List. Carb count excludes sugar alcohols. Net carb count excludes both fiber and sugar alcohols, because these do not affect blood sugar in most people. We try to be accurate, but feel free to make your own calculations.
Did you make this recipe?
Join the Easy Keto Challenge to enter monthly giveaways every time you share your pics of my recipes!