Corn Chowder with cornstarch

2 slices bacon , diced 1 tablespoon unsalted butter 1 3/4 cups diced onions 3 -4 tablespoons unbleached flour (I used a gluten-free blend or garfava flour,[...]

3 ears fresh corn or 3 ears bicolor corn 4 ounces bacon , cut into 1/3 inch dice 2 tablespoons unsalted butter 1 medium onion , cut into 1/2 inch dice 1/2[...]