1 sliced orange
1/2 sliced lemon (although using 1 is possible if you like)
a chunk of fresh ginger, peeled and chopped
Put in a pot. Cover with water. Boil for several minutes.
Pour the water into a cup.
Add honey according to taste.
Optional: Some liquor, preferably whisky or cognac.
Edit: The point of this is the ginger. The citrus is there for the sake of your tastebuds, which presumably are not used to a strong homemade ginger brew.