Beef and Cauliflower Casserole

Ingredients

• 1 1/2 pounds 93% lean ground beef
• 1 tsp. garlic powder
• 1/2 tsp. salt
• 1/2 tsp. black pepper, ground
• 1 tsp. crushed red pepper (OPTIONAL)
• 1 1/2 pounds cauliflower, chopped
• 1 large onion (about 14 oz. or 2 cups), sliced
• 1 medium green bell pepper, chopped
• olive oil spray
• 1/2 tsp. salt (Divided)
• 1/2 tsp. black pepper, (Divided)
• 1 can (14.5 oz.) fire roasted diced tomatoes, no salt added
• 1 cup (about 3 oz.) pepperoncini, sliced