I make both risotto and pasta with vegetables of various kinds. The ones i like best are cauliflower, broccoli, zucchine, asparagus.
The method is pretty much the same. You need to cut up the vegetables to a bite-size shape, and peel those with hard skins (broccoli and cauliflower stems, and i also peel the bottom part of asparagus - but not zucchine).
The big difference between pasta and rice dishes is you cook the vegetables separately for pasta and then mix when the pasta is cooked, and for rice, you pre-sautee the vegetable partly, then add the rice, sautee that, and then add broth or water and cook through.
a couple of examples:
pasta with zucchine
cut zucchine into cubes, about half an inch across. About one small or half a large one per person. Take a large garlic clove per person and slice it in 4 or 5 pieces. Put extra virgin olive oil in a large frying pan or chicken fryer (high straight sides, works easier to turn the vegetables without them flying all over the place). You need to completely film the bottom, and maybe have it 1/8 of an inch deep, or a little less. Turn heat on low, add garlic and zucchine, salt and pepper, and cook very slowly, till the zucchine "melt" - get soft and squishy - don't let the garlic brown. Cook short pasta (penne, elbows, shells, rigatoni) and when it's done mix the pasta with the zucchine and garlic. Put plenty of parmigiano on top.
risotto with zucchine
For risotto with zucchine, i would use onion rather than garlic. I use less fat, in any case, than for pasta, since it doesn;t have to become like a sauce. Start sauteeing the onion till it gets almost soft, add zucchine and let it begin to sautee, then add the rice (short grain, not perfumed, not parboiled, plain rice like arborio, if you can get it, but you can do it with any unperfumed rice and it tastes good even if not traditional. I also make this sort of dish with brown rice or wheat or barley, different, but also good). Cook stirring till the rice is all wet with the fat and has cooked a little but not browned. Add water, or stock of your choice, just enough to let the rice poke through, stir regularly, add more stock (or you can just add an equal part by volume - measure from top of rice to bottom, putting your thumb on the side of a knife you stick into the pot, then add that much water measuring from the top of the rice to the top of the water.) (Oh, and a rule of thumb is to use two good fistfuls of rice per serving). Cook till creamy and rice is al dente.
broccoli or cauliflower
With broccoli or cauliflower, for pasta or rice i use garlic, and occasionally some hot pepper (two or three small red cayenne type peppers). Sautee till the vegetable is completely cooked and mushy if it's going to be for pasta, a little less for rice (since it will finish off with the liquid and rice). This is not the time for bright green crunchy broccoli.
For asparagus i use butter, scallion greens, cut to the same length (about an inch) as the asparagus. I sautee till tender for pasta, and till half tender for risotto, adding chicken stock for risotto.
Add lots of grated parmigiano as soon as you drain the pasta, and it will melt onto the pasta, then add the vegetables.
Another possibility is risotto with squash. Onion, butter, squash, let it start to get mushy, then add rice, liquid.
leftover risotto croquettes
I always made extra risotto when the kids were still living here. Next night, into the cold risotto i mixed a couple of handfuls parmigiano, an egg, and a little flour if it was too liquid to shape into balls. Shape into croquettes, cylinders are easiest. Roll in flour, then beaten egg, then breadcrumbs. Fry in a half an inch of oil till browned. You can also add some ham or bacon or pancetta, and/or you can bury a piece of cheese or mozzarella in the center, and you have "suppli' al telefono" - telephone croquettes - when you break them open they have a string of cheese between the two halves, like a phone and its receiver.
other choices are combinations of rice or pasta and beans or chick peas. These will give you full useable protein if you eat them together. If you want some recipes, let me know. that's enough for tonight