Lasagna Casserole

Name: Lasagna Casserole
Prep time: 35 min
Cook time: 50 min
Total time: 1 h 25 min
Cuisine: American
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