Low Carb Cauliflower Casserole with Beef Marinara (Gluten-free)

INGREDIENTS

head Cauliflower ((cut into florets))

1 tbsp

Olive oil

1 lb

Ground beef

1/2

large Onion ((chopped))

2 cloves

Garlic ((minced))

1 cup

Marinara sauce

1 14.5 ounce can

Diced tomatoes

1/2 cup

Fresh basil ((chopped, divided))

1 cup

Mozzarella cheese ((shredded))

Sea salt

Black pepper