Steps
1. Rinse the buckwheat under cool water. Combine it with the water and a pinch of salt in a small saucepan. Bring to a boil, cover, and simmer gently until tender and the water is absorbed, about 12–15 minutes.
2. Meanwhile, warm the olive oil in a skillet over medium-high heat. Add the mushrooms in a single layer and cook, stirring occasionally, until browned and tender, about 7–9 minutes.
3. Stir in the garlic and butter; cook for about 30 seconds, just until fragrant. Season with salt and pepper.
4. Fluff the buckwheat with a fork and fold in the lemon juice and half the dill. Spoon into a bowl, top with mushrooms, and finish with the remaining dill.