This is a delicious one-pot wonder, great for a busy working weeknight with minimum dishes! The linguini is cooked directly in broth and cream with plump grape tomatoes and pearl onions, and finished with spinach, calamari and shrimp. The sauce thickens down nicely as the pasta cooks, making a creamy, tasty reduction all at the same time. 2 Tbsp butter plus 2 Tbsp olive oil 8 oz frozen pearl onions 1 pint grape tomatoes 3 cloves garlic, pushed through a press 2 cups chicken stock 1/2 cup water 1/2 lb linguini 1 cup heavy cream 1/4 tsp rushed red pepper flakes, or to taste 5 oz fresh baby spinach leaves 1/4 lb calamari rings, halved 1/4 lb shrimp, peeled and deveined, cut into1/2-inch pieces 1/2 cup grated Parmesan cheese Palmful fresh parsley, finely minced Heat the water and chicken broth to nearly boiling. In a large pot, melt the butter in the olive oil. Add the frozen pearl onions and sauté over medium-high heat for about 5 minutes, stirring often. Add the tomatoes and cook fo...