Spicy Veal Roast

1/4 tsp salt
1/2 tsp black pepper
1/2 tsp cinnamon
1 1/2 tsp cumin
3 lb boned lean veal shoulder, trimmed, rolled, tied
4 tsp olive oil
1/2 lb onions, peeled
1/2 clove garlic, peeled
2 tsp dried tarragon
4 sprigs fresh parsley
1 tsp thyme
1 bay leaf