Add crushed tomatoes and water to the skillet and bring to a simmer. Reduce the heat to low and simmer for 10 minutes, or until the sauce has thickened slightly.
To make shakshuka in the oven, preheat the oven to 375 degrees F. Once the eggs are added to the sauce, transfer the skillet to the oven and bake for 10-12 minutes, or until the eggs are cooked to your liking.