Sheet Pan Lasagna Recipe {Easy Method}

Ingredients

• 4 tablespoons olive oil (divided)
• 2 garlic cloves (minced)
• ½ teaspoon crushed red pepper
• 1 5-ounce container baby spinach (roughly chopped)
• 1 teaspoon salt (divided, plus more for cooking pasta)
• 1 cup ricotta cheese
• 1 pound ground beef
• 1 onion (diced)
• 1 teaspoon Italian seasoning
• 1 pound lasagna sheets (broken into 2-inch pieces)
• 1 25-ounce jar marinara sauce
• 2 ½ cups shredded low moisture mozzarella (divided)
• 1 ½ cups freshly grated parmesan cheese (divided)