Blue Goose (Tex-mex), Fuzzy's Taco, Sannabels (Mediterrean lunch buffet), Rudy's
Rudy's BBQ, Mooyah (Burgers), Fogo de Chao (Brazilian Steakhouse - if someone else will pony up $50)
I used to work in Addison, which is close to Richardson. There is also a Trader Joe's if you want groceries close to Richardson.