

Place yuca in a saucepan; add water until yuca is just covered. Add salt and lime juice, and bring to a boil. Reduce heat, cover, and simmer until tender -- about 30 minutes. Drain. (Remove any "woody" parts from the center of yuca.)
Mash garlic cloves into salt with mortar and pestle. Add garlic, lemon juice, and onions to olive oil in a separate saucepan, heat until bubbling, and then pour over yuca.
Toss the yuca and all ingredients lightly while continuing to sauté over medium heat until barely browned, but not crisp!