Set the Instant Pot to “Sauté” and place in it the bacon.
Cook until the grease melts, some 2-3 minutes, occasionally stirring.
Add the onions, and cook for another 2 minutes while occasionally stirring.
Add the green beans, salt, pepper and water and stir to combine.
Place and lock the lid, and manually set the cooking time to 4 minutes at high pressure.
When done quick release the pressure and adjust salt and pepper if needed.
Serve warm. (Calories: 122 | Total Fats: 7g | Net Carbs: 7g | Proteins: 4g |Fibers: 3g)