Wash the kale thoroughly under cold water.
Remove the tough stems from the kale leaves and discard them.
Chop the kale into bite-sized pieces and place in a large bowl.
Halve the cherry tomatoes and add them to the bowl.
Dice the bell pepper and cucumber, then add to the salad.
Thinly slice the red onion and add it for extra flavor.
If using, crumble feta cheese over the salad.
Add nuts for crunch and healthy fats.
Drizzle olive oil and lemon juice over the top.
Season with salt and pepper to taste, then toss gently to combine.