Corn Chowder with cayenne

1 (10 ounce) box frozen corn in butter sauce 1 tablespoon olive oil 1 medium onion , chopped (1/2 cup) 1 medium bell pepper , chopped (1 cup) 1 stalk celery ,[...]

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,[...]