In a large pan, melt butter with 4 tbsp of water on medium low heat. Bring to a simmer (do not reduce water completely to prevent sauce from separating). Season with salt. Cook tortelloni according to packaging instructions. Strain and gently toss tortelloni with fresh cherry tomatoes and charred corn in the pan with the butter. Season with salt & pepper. Plate tortelloni and garnish with avocado, lime and cilantro leaves.