Soft Polenta with Roasted Red Peppers

Name: Soft Polenta with Roasted Red Peppers
Ingredients: 2 tablespoons olive oil; 1 medium onion, finely chopped; 3 cloves garlic, finely chopped; 4 1/2 cups chicken stock, preferably homemade; 1 1/2 cups water; 1 1/2 teaspoons coarse sea salt; 1 1/2 cups polenta or coarsely ground yellow corn meal; 4 tablespoons unsalted butter; 2 teaspoons finely chopped fresh thyme leaves, or scant 1 teaspoon dried thyme, crumbled; 1/2 teaspoon freshly ground black pepper; 1/2 cup grated Spanish Manchego cheese; 1 red bell pepper, roasted (see Note), and cut into 1/2 inch dice; 1/2 small bunch cilantro, leaves only, finely chopped