chicken breast • vegetable oil • minced garlic cloves • chopped medium onion • "papa criollas" (petite) • Yukon gold potates or "papa amarilla", peeled & cut in 4 • Russet or white potatoes, peeled & cut in 4 • fresh corns, cut in 2 pieces • chopped cilantro • guascas • scallions, chopped • chicken broth •