No problem.
We often put nuts in stews. Cashews, peanuts and almonds work best. For us, we throw them in 30 minutes before the end/serving. Experiment and find out what works for you. I think the obit one we've not tried in a stew is hazelnut. They're very expensive in Australia and hard to obtain (which is a shame because i love them).
I've got a recipe on here somewhere for walnut and poppy seed dumplings in a bechamal sauce. The walnuts are ground (food processor).
Recipe - Baked Walnut & Poppy Seed Dumplings with Béchamel But I think it would work with any ground nuts with a higher oil content like walnuts. Thinking about it, walnuts should cook well as well...
I've also got a walnut and mushroom dish I'm making for later in the week as well. The walnuts are chopped in a food processor to grind them for that as well.