The cookbook that came with mine says:
ribeye, round steak, and tenderloin 5-7 minutes
sirloin 7-9 minutes
T-bone 8-9 minutes ( I haven't done these.)
I find I might cook it a little longer, we like them well done. Depends on the thickness.
Bottled Italian salad dressing works as a good marinade. I like to use rubs. Here's a couple recipes for rubs: (Refrigerate any leftover)
Mustard Pepper Rub
1 T. dry mustard
1/4 c. Paprika
2 T. black pepper
1T. cayenne papper
1 T. sugar
Southern Onion rub
2 T. dried onions
1/4 c. paprika
1 T. black pepper
2 t. cayenne pepper
2 t. onion powder
1 t. salt
here's one for a dipping sauce:
8 oz. tomato sauce
2 T. yellow mustard
2T. dark brown sugar
2 T. soy sauce
2 T. cider vinegar
2T. worchestershire sauce
1 T. lemon juice
2 cloves garlic, finely chopped
1 T. fresh parsley, finely minced
Combine all ingredients in a saucepan and simmer over low heat for 15 minutes. Sauce should be thickened slightly when done. COol. Use immediately or store in refrigerator.