Crockpot Boeuf Bourguigon Recipe

4 Lbs beef chuck*
1/4 c Butter or margarine
6 Carrots;cut in 1/2-in slices
2 Onions, chopped
2 cn Beef broth; 13 1/2 oz each
2 c Dry red wine
1 cn (6-ounces) tomato paste
1 Teaspoons fines herbes
Salt & pepper to taste
1/2 lb Fresh mushrooms, quarterd
18 Sm White onions, peeled
1/4 c Flour
1/4 c Butter or margarine