Preheat Oven To 350 Degrees F (175 Degrees C). Grease A Baking Sheet. Mash Black Beans In A Bowl; Add Onion, Garlic, Carrots, And Green Bell Pepper. Mix. Whisk Cornstarch, Water, Chile-Garlic Sauce, Chili Powder, Cumin, Seafood Seasoning, Salt, And Black Pepper Together In A Separate Small Bowl. Stir Cornstarch Mixture Into Black Bean Mixture. Mix Whole-Wheat Bread Into Bean Mixture. Stir Flour, 1/4 Cup At A Time, Into Bean Mixture Until A Sticky Batter Forms. Spoon 'Burger-Sized' Mounds Of Batter Onto The Prepared Baking Sheet, About A 3/4-Inch Thickness Per Mound. Shape Into Burgers. Bake In The Preheated Oven Until Cooked In The Center And Crisp In The Outside, About 10 Minutes On Each Side.