Sweet Potato and Gruyère Lasagna | culture: the word on cheese

Ingredients

• 1 large sweet potato (peeled and chopped into)
• 2- inch cubes
• ½ pound ground turkey breast
• 1 pound ground turkey thigh
• 2 28- ounce cans crushed tomatoes
• 1 6- ounce can tomato paste
• 1 medium Vidalia onion (finely diced)
• 3 cloves garlic (minced)
• 2½ teaspoons kosher salt (divided)
• 1 teaspoon ground black pepper (divided)
• 1 teaspoon fresh thyme (chopped)
• 1 teaspoon fresh oregano (chopped)
• 12 lasagna noodles
• 16 ounces ricotta cheese
• 1 large egg
• 1 teaspoon olive oil
• 8 ounces Gruyère cheese (grated and divided)
• ¾ cup grated parmesan cheese (divided)