In a large microwavable container, add rice, warm water, bouillon, tomato paste and pepper. Make sure paste is well incorporated into the rice mixture. It helps if your water is warm, then you can dissolve your bouillon and paste before adding to rice. Once mixed, place in microwave with lid slightly covering but not closed and microwave for about 5 mins. Let rice sit for another 5 mins or until liquid is dissolved and rice is tender to fluff with a fork.