My Go-To Sautéed Shrimp & Mussels in Tomato Sauce

Ingredients

• 2 tablespoons olive oil
• 3 cloves garlic, minced
• 1 medium onion, finely chopped
• 1 can (14 ounces) crushed tomatoes
• 1 teaspoon dried oregano
• 1/2 teaspoon red pepper flakes (optional)
• Salt to taste
• Pepper to taste
• 1 tablespoon fresh basil, chopped (optional)
• 1 pound large shrimp, peeled and deveined
• 1 pound mussels, cleaned and debearded
• 1 tablespoon fresh lemon juice
• Fresh parsley, chopped for garnish