What about beef teriyaki with rice? You can buy bottles of ready made teriyaki sauce or it's simple enough to make your own.
You need equal quantities of soy sauce and mirin (6 tbsp)and sugar to taste (probably 1-2 tsp). Combine all ingredients in a saucepan and stir well. Put it on medium heat and bring to a boil. Turn down the heat to low and simmer for a couple minutes. You can use it as a marinade and then stir fry the beef. If you want to make it in advance just cool the sauce and store in a clean bottle in the refrigerator.
Your idea sounds great. I would definitely do it with peppers and onions as well, and paprika, but if you can't do peppers:
with asparagus and thyme and in a cream sauce made with white wine and grain mustard over pasta and in a green peppercorn sauce over pasta with broccoli (regular or purple sprouting) and a sesame dressing with soy sauce and garlic
Just fry until it's slightly crisped in lots of olive oil with chopped chillies and garlic. Serve it over linguine with parmesan with a nice green salad. The garlicy oil lubricates the pasta. We used to eat this with salad instead of pasta when we were on a low-carb diet.