1. In a small saucepan, heat water to boiling, add couscous, cover and set aside.
2. Add oil to wok or heavy skillet; over high heat, quickly brown meat; add peppers, carrots, and onions.
3. Continue stirring until vegetables are slightly cooked, about 2-3 minutes.
4. Add basil, mustard, and vinegar and mix thoroughly.
5. Reduce heat to low, toss spinach on top, cover and allow to steam 3 or 4 minutes.