I have not tried this yet but wanted to place it here for safe keeping. The recipe called for a blast of salt, pepper, squirt mustard, tobasco and soy sauce with no actual measurement amounts so I guess you can use your own judgement according to your taste. If anyone does make this recipe I would love to know how it came out. I'm sure you could marinade these for several hours or overnight. Serving size is approximate; it depends on individual appetites, at my house this would serve 3 big appetites as we love steak tips.