Heat a large skillet over medium-high heat.
Heat butter and oil, then cook sage until it begins to blacken, 1 to 2 minutes.
Add garlic and cook until golden, about 2 minutes.
Add beans and salt; toss to coat.
Carefully add 1 cup water.
Steam until beans are fork-tender and most of the water has evaporated, 3 to 4 minutes.
Season with salt and pepper.
Sprinkle hazelnuts on top and serve.
Source: Self.com