Cheesy Lasagna Casserole Easiest Weeknight Dinner

Ingredients

• 1 tablespoon olive oil (15 ml)
• 1 pound ground beef (450g)
• 1 medium onion, chopped (approx. 1 cup)
• 2 cloves garlic, minced
• 1 (28 ounce) can crushed tomatoes (794g)
• 1 (15 ounce) can tomato sauce (425g)
• 1 teaspoon dried oregano (5 ml)
• 1/2 teaspoon dried basil (2.5 ml)
• 1/4 teaspoon red pepper flakes (optional, 1.25 ml)
• Salt and black pepper to taste
• 15 ounces ricotta cheese (425g)
• 1 large egg, lightly beaten
• 1/4 cup grated Parmesan cheese (25g)
• 1/4 teaspoon salt (1.25 ml)
• 1/4 teaspoon black pepper (1.25 ml)
• 9 ounces lasagna noodles (255g)
• 2 cups shredded mozzarella cheese (225g)