Lasagna Casserole Recipe

Ingredients

• 1 (12 ounce) box jumbo pasta shells
• 0.25 cup extra-virgin olive oil, divided
• 1 pound ground sirloin
• 1 pound Italian sausage, hot or sweet
• 1 small yellow onion, finely chopped
• 6 cloves garlic, thinly sliced
• 1 (26 ounce) jar prepared marinara sauce
• 1 cup loosely packed fresh basil leaves
• 0.5 teaspoon crushed red pepper flakes
• 1 (15 ounce) container whole milk ricotta cheese
• 0.25 cup finely grated Parmigiano-Reggiano plus additional for serving
• 0.25 cup heavy whipping cream
• 1 teaspoon kosher salt
• 1.5 cups shredded part-skim mozzarella cheese
• cooking spray