Creamy Red Pesto Chicken

Name: Creamy Red Pesto Chicken
Ingredients: 2 chicken breast fillets; 250 grams (8.8 oz) cherry tomatoes; 2 tablespoons unsalted butter; 2 tablespoons oil from sun-dried tomatoes; 4 garlic cloves, minced; 1 small onion, finely chopped; salt + black pepper; a pinch of sweet paprika; 1 teaspoon red pepper flakes; 2 tablespoons tomato paste; 125 milliliters (1/2 cup) chicken broth; 125 milliliters (1/2 cup) cream with 20% fat, or half-and-half; 20 basil leaves; sunflower seeds, for serving; red pesto (equal to 1/2 cup store-bought pesto); 40 grams (1.4 oz) toasted sunflower seeds, or toasted pine nuts; 10 semi sun-dried tomatoes; 3 tablespoons oil from sun-dried tomatoes; 1 teaspoon dried basil; 30 grams (1 oz) grated Parmesan; 1 tablespoon tomato paste