In a bowl add your shrimp, 1 clove of minced garlic, lemon zest, half a teaspoon of salt, mix well and let marinate until ready to pan sear.
In a skillet on medium heat add 1 tablespoon of olive oil add your orzo. Toast until a few pieces of orzo start to brown. Add 1 clove of minced garlic, sauté for about 30 seconds and add chicken stock and 1/2 teaspoon of salt to orzo and cook until al dente. (Add more chicken stock to the saucepan if necessary if the pasta absorbs all of the liquid during the cooking process.)
While the pasta is cooking, heat 2 tablespoons of olive oil in another pan or skillet over medium high heat. Remove chorizo from casing and add to pan sautéing until it is browned.
When chorizo is cooked add onions to pan and sauté until they begin to soften. Add 1 clove of minced garlic and add your green bell peppers and sliced hot peppers to the same pan and sauté. Add your crushed tomato, mix together and season with salt and pepper to taste remember that chorizo has salt so depending on the sausage use you may need more or less salt to taste. Remove from pan and set aside.
When your orzo is ready, most of the stock should be absorbed but there should be a bit of liquid in the pan with the orzo. Remember while orzo is cooking your want to check on it to make sure you add more liquid (water of stock) as necessary as stock is absorbed but you don't want your orzo to be swimming in liquid.
Pan sear your marinated shrimp, do not cook fully, you just want it to get some colour and set aside. If you are garnishing with sliced lemons I also toss them in the pan for a quick sear on each side to give them some colour.
Take your chorizo veggie tomato mixture, and mix it into your orzo in the skillet the orzo was cooked in, until well combined and mixture is evenly distributed. Arrange your pan seared shrimp onto of your orzo and add about 1/4 cup of chicken stock if there is no liquid in your orzo.
Garnish with finely chopped parsley, sliced lemons of you would like. Cover your orzo and pan seared shrimp with a lid to steam up the shrimp so it finishes cooking it and to thoroughly heat your orzo.
You can leave orzo on stove for about 5-7 minutes at low to medium heat. Most of the liquid in orzo should be absorbed, shrimp should be done and your orzo will be ready to eat.
Serve hot!