Spaghetti Squash Gratins with Chunky Tomato Sauce

Ingredients

• 1 (2 pound) spaghetti squash
• 1 tsp olive oil
• 2 garlic cloves, minced
• 1 tsp kosher salt, divided
• 1/2 tsp freshly ground black pepper, divided
• 1/4 tsp crushed red pepper
• 2 (28 ounce) cans whole tomatoes, drained and chopped
• 3 oregano sprigs
• 3 thyme sprigs
• 1/2 cup grated fresh Parmesan cheese
• 2 tsp chopped fresh oregano
• 1 tsp chopped fresh thyme
• 1 (15 ounce) carton fat-free ricotta cheese