For our money, Oscar's is the best Mexican "interior" styled restaurant in NE Tarrant. Oh sure, they have tacos y enchiladas, but that's not what they excel at. Sample some of their specialty dishes, and I think you'll agree that Oscar's has some very unique recipes and flavors, which distinguishes them from other restaurants in the area. My favorite dish is the chicken breast smothered in a creamy ancho chile wash (Pollo Cozumel). Has a slight kick and is delicious. The rice and beans are well prepared and it also comes with a small salad. Mrs. RJG has a similar dish except she prefers the green poblano sauce. Chips and salsa are fairly standard, but they do have an excellent creamy jalapeno sauce if you ask for a spicier option.
Oscar's is a "destination" Mexican restaurant, with a full bar and beautiful surroundings. Give it a try if you want an alternative to the standard Tex-Mex.