Shrimp With Feta and Tomatoes

Name: Shrimp With Feta and Tomatoes
Ingredients: 2 Tbsp. extra-virgin olive oil; 1 lb. large shrimp, peeled, deveined, patted dry; Kosher salt, freshly ground pepper; 2 Tbsp. unsalted butter; 1 medium onion, finely chopped; 5 garlic cloves, finely chopped; 2 Tbsp. double-concentrated tomato paste; 2 lb. plum tomatoes, chopped; ¼ cup finely chopped basil; 2 tsp. Dijon mustard; 1 tsp. sugar; ½ cup dry white wine; 2 Tbsp. fresh lemon juice; ¼ cup finely chopped parsley, plus more for serving; 2 oz. feta, crumbled; Toasted country-style bread (for serving)