on their own they make a great snack- roast and season with whatever sort of salty business you like (my daughter made a great one with powdered dry tomato, nutritional yeast and garlic salt. fabulous).
We also have made "seed mix" for sprinkling on things- pretty much every kind of seed you would like to see on top of a bagel or roll, with a bit of rolled oats and pan-toasted and mixed with some coarse salt, goes nicely on top of a savory oatmeal, some cooked greens, etc. I am a big fan of sprinkling salty things on other food.....
In reality, the way I get the pumpkin seeds into my husband is a seed powder. I grind up flax, chia and pumpkin in 1:1:1 proportions and he puts two spoons on top of his oatmeal every morning. It gives his breakfast a good protein bump and he also gets the omegas/fiber/etc. while not even really thinking about it. For myself, I might sprinkle it on cut apples or yogurt and fruit.
(edited to clarify, i'm talking about the green pepitas. We have invested so much money in dental work that nobody is cracking seeds with their teeth around here.
Also, I have also used them in pesto and yes, fabulous.)