Red Pesto Spaghetti Bolognese

Ingredients

• 14 ounces spaghetti
• 3 tbsp oil reserved from sun-dried tomatoes
• 1 small onion (finely chopped)
• 4 garlic cloves (minced)
• 1.1 pounds ground pork (or beef)
• 2 tbsp tomato paste
• 2 cups puréed tomatoes
• 7 ounces sun-dried tomatoes (without oil)
• 5 1/2 ounces red pesto (store-bought or home made)
• 3/4 cup whole milk
• 2 tbsp chopped parsley
• grated parmesan (for serving)
• 1 tsp salt
• 1 tsp black pepper
• 1 tsp sweet paprika
• 1 tsp dried oregano
• 1 tsp dried sage
• 1/2 tsp crushed red pepper flakes (more for serving)