Plot: Call it coincidence or call it fate, but Mexico’s national colors–red, white and green–wind up at the center of a whole family of emblematic, home-style “comfort food” dishes, known simply as “a la Mexicana. ” Ripe red tomatoes, sparkling white onions and green chiles are the “holy trinity” on which these dishes are based–dishes like hearty Braised Beef Short Ribs a la Mexicana with tomatoes, poblano chiles and herbs, or a quick-to-prepare Grilled Flank Steak served with a salsa of roasted tomatoes, poblanos, onions and garlic