To make the pesto, combine all ingredients except for olive oil in a food processor or high-powered blender such as a Vitamix. Slowly drizzle in olive oil as you blend until your desired consistency is reached. I like to use a little less oil for a thicker consistency.
To make the pasta salad, cook tortellini according to package directions. Add carrot coins in the last few minutes of boiling so that they are just slightly tender. Drain, rinse with cold water and let cool to room temperature. Stir in bell pepper, spinach, cherry tomatoes and pesto.