Foryoueats: Nicole's Best Baked Ziti

1 tablespoon kosher salt

1 (16 ounce) package ziti pasta

¾ pound ground Italian sausage

¾ pound ground sirloin

1 small onion, finely chopped

2 cloves garlic, minced

1 teaspoon kosher salt, divided

¾ teaspoon ground pepper, divided

¼ teaspoon crushed red pepper flakes

2 (24 ounce) jars marinara sauce

½ cup water

1 (15 ounce) container whole milk ricotta cheese

¾ cup grated Parmesan cheese, divided

1 large egg

1 tablespoon chopped fresh Italian parsley

1 tablespoon chopped fresh basil

1 ½ (8 ounce) packages mozzarella cheese, shredded

Nicole's Best Baked Ziti