Clean Brussels sprouts, remove outside dark or yellow leaves and trim stem.
When water is boiling, add whole Brussels sprouts and boil for about 4-5 minutes. They should meet a slight resistance when a fork is inserted.
Immediately plunge the Brussels sprouts into an ice bath and set aside.
Peel and thinly slice the red onion. Crumble Feta and crush Almonds if not using slivered.
Once the Brussels sprouts are cooled, remove from water and allow to drain for a few minutes. Slice thinly.
Place the Brussels sprouts into a large mixing bowl and add your red onion, feta cheese, crushed or slivered almonds, honey, lemon juice, salt and pepper.
Mix well to coat the ingredients with the honey and adjust the salt and pepper to taste.
Serve right away or can be refrigerated up to 3 days.