Poor Man'S Steak - cooking recipe

Ingredients

3 to 5 lb. chuck steak or roast
2/3 c. wine vinegar
2 Tbsp. salad oil
2 Tbsp. prepared mustard
freshly ground pepper
1 chopped onion

Preparation

Mix well the vinegar, oil and mustard; add onion.
Grind pepper over top and stir.
Marinate steak in mixture for 2 to 4 hours, turning occasionally.
Charcoal as steak!