Creamy Salsa Taco Spaghetti Bake

INGREDIENTS:

8 ounces spaghetti noodles
1 pound ground beef or turkey
1 small onion, diced
1 packet taco seasoning mix
1 cup salsa
1 cup sour cream
1 cup shredded cheddar cheese
1 cup shredded Monterey Jack cheese
1/2 cup chopped fresh cilantro (optional)
Salt and pepper to taste
Sliced jalapeños for garnish (optional)

INSTRUCTIONS: