i have been helped by so many of you for a scary number of years, without having much to contribute in return, but you finally have a question right up my obsessively (for pesach) frum alley.
for me, the key to eating decent food over pesach is not to think of food as having to be made especially for pesach. (ok, well, that, and having enough leftovers from seder.) forget eating the often-disgusting prepared food that is made just for pesach because nobody with functional taste buds would eat it the rest of the year. you have not lived -- or had a good enough reason to die -- until you have eaten kosher-for-passover cheerios. or mayonnaise. not to mention blintzes, or -- not kidding -- tacos.
so: eat food. fresh vegetables, roasted, steamed, sauteed, in terrines, with olive oil, fresh or dried herbs, garlic, lemon, lime juice or orange juice. vegetable soup, made without beans or impermissible grains (i.e., barley,) either chunky or pureed with a little cream. latkes (not just potato, but carrot, sweet potato, zucchini,) topped with yoghurt.
fish, roasted/baked/braised with wine, orange juice, olive oil, garlic, herbs, mirepoix. i love sardine butter (sardines mashed with butter, smeared on matzo,) but i love this the rest of the year, too.
eggs: scrambled, omelet, poached, stirred into piperade. especially stirred into piperade. frittata with just about anything (we like goat cheese, roasted red peppers, and asparagus, but then we like goat cheese, roasted red peppers and asparagus when they are not in frittata, too.)
meat: my go-to chicken recipe -- i think it’s marcella hazan’s -- is pan-roasted chicken with rosemary, white wine and garlic. it tastes just as good during pesach. (use all olive oil, or olive oil and margarine instead of butter.) (i brown the chicken more than she says to before adding the wine.) and there’s the standard french roasted chicken with wine, potatoes and shallots, again with margarine instead of butter. (truthfully, i don’t make often make these during the holiday, because i have leftover brisket/turkey/salmon. i probably will this year, because i am going to be a guest instead of host.)
sauces: pesto, aoili, tomato sauces, hollandaise, bearnaise (it’s probably been 20 years since i made bearnaise, but you could.) just nothing with flour or mustard.
not being able to use mustard is, for me, the hardest part. it is kitniot, which screws any salad dressing i want to make. so i do buy bottled salad dressing, not really for salad, but for canned tuna. when my kids were in school, we would dress tuna with a little pseudo-italian balsamic dressing and stuff it into raw peppers to take to school for lunch during the holiday.
you can buy kosher-for-passover balsamic vinegar to use on salads, as well as on vegetables.
for dessert: there are a lot of kosher-for-passover cakes, some of which i think are not bad. (the chocolate rolls, for example.) we binge on the chocolate bonbons with chocolate [pseudo]cream, eaten about five minutes out of the freezer. (this is our one exception to the “real food” rule.) other than chocolate, we eat fruit. lots of fresh fruit. or poached in syrup, but mostly i don’t bother.
hope this is helpful.
i love this holiday.