## 🔥 Directions
1. **Caramelize the onions**:
In a skillet over medium-low heat, add olive oil and sliced onions. Cook slowly, stirring occasionally, until golden brown and jammy—about 20–25 minutes. Optional: add a splash of balsamic vinegar near the end for a sweet-tangy finish.
2. **Assemble the sandwiches**:
Butter one side of each slice of bread. Place two slices, butter-side down, in a skillet. Top with cheese slices and a spoonful of caramelized onions. Cover with remaining bread, butter-side up.
3. **Grill until golden**:
Cook over medium heat for 3–4 minutes per side, pressing lightly with a spatula, until the bread is golden and crispy and the cheese is fully melted.
4. **Serve hot**, with a side of tomato soup, pickles, or just on its own—Hollywood-style.
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