In an 8-quart saucepan on medium heat, add butter and melt brown sides. Add water and bring to a full boil, reduce to low-medium and remove the foam on top of the water. Add onions and garlic and allow to cook covered for one hour.
Add bouillon, potatoes, corn, peas, green beans, tomato paste, Worcestershire sauce, sugar, thyme, bay leaf, salt, and pepper, carefully mix. Bring to a full boil, cover, and allow to cook on low for 30 minutes.
In a small cup, add flour and about 1/4 cup of broth from the stew, mix well until no longer lumpy, then add into the stew, stir—cover and cook for an additional 10 minutes.