In the Base of the Smart Multi-Cooker, stir together 1 tsp. salt and pasta; add water to the ring indentation in the Base. Place Large Shielded Colander inside Base (without removing pasta) add chicken into Large Shielded Colander. Cover with Shielded Cover and microwave on high power 8 minutes. Remove from microwave.
Place Shallow Colander with vegetables on top of Large Shielded Colander. Cover with Shielded Cover and microwave on high power 3 minutes more. Remove from microwave, let stand, covered, 4 minutes.
To make the sauce, in the 2-cup Micro Pitcher, stir together tomato paste, crushed tomato, chicken stock, corn starch, oregano, and salt. Cover with the 1 cup micro pitcher and microwave on high 2 minutes.