What exactly are beef tips? I've seen recipes that describe them as "Stew beef" and at other times as "sirloin tips". Meat is not my forte, but I want to learn. I'm also looking for some really delicious recipes that features a beef-filet-type meat - tender and melt-in-your-mouth -without mortgaging the house to buy the whole filet. Can beef tips be what will fill the bill?