Cook the agnolotti: Bring a large pot of water with a large pinch of salt to a boil. Once boiling, add the agnolotti and cook for 4-5 minutes, until tender and floating to the top of the water. Drain, reserving 1/2 cup pasta water.

Prep the ingredients: While waiting for the water to boil, peel, core, and dice the apple into 1/2-inch cubes. Mince or grate the garlic. Finely chop 2 teaspoons of sage leaves.

Heat 2 Tablespoon butter in a medium pan over medium heat. Add the apples, chopped sage, and garlic to the pan and cook, tossing, until the butter begins to turn a speckled golden brown. Quickly add 1/2 cup pasta water (careful, it will sputter!) and the vegetable stock concentrate the pan. Cook, tossing, until the apples are just barely tender and the stock has thickened, for 2-3 more minutes. Season with salt and pepper.

Add the spinach to the pan, working in batches if necessary. Cook, tossing carefully, for 3-4 minutes, until the spinach has wilted and a thick sauce has formed. Carefully toss the sour cream and drained agnolotti into the pan. Taste and season with salt and pepper. HINT: Add a splash of water or pat of butter if the sauce becomes too thick.

Plate: Serve the agnolotti divided between bowls and enjoy!