Peel and slice potatoes and carrots 1/4" thick.Par-boil in pot of salted water 5 min.Drain.Peel and chop onion. Set aside.
Mix 1 cup water and tobasco sauce to taste in small cup or glass.Assemble all ingredients on work surface together.
Using non stick alum. foil, each sheet 12 in. square, tear off 6 sheets.Assemble bundles in this order... 1 scoop potatoes and carrots on bottom followed by onions to taste. Add 1 tbsp butter on top 2 tbsp water/tobasco mixture and salts and pepper to taste.
Gather corners of foil on top to make bundles and twist top tight. Bake in 350 oven for 30 min. or place on grill indirect heat fo 30/40 min.