Wash the Swiss chard thoroughly and remove the stems (they can be kept for another use). Stack the leaves and then roll them into a cigar shape and slice into ribbons around ¼ inch thick.
Toast the pine nuts (or sunflower seeds) in a frying pan or saucepan on medium-high heat. Once the pan is hot, watch closely as the pine nuts can burn quickly. Toast for one or two minutes until browned to taste.
Add the chopped chard, halved cherry tomatoes, sliced red onions, and toasted pine nuts or seeds to a salad bowl.
Make the dressing: In a cup or small bowl, whisk together the extra-virgin olive oil, lemon juice, lemon zest, garlic, maple syrup or agave nectar, salt, and pepper.
Drizzle the dressing over the salad ingredients and toss gently to combine, ensuring all the leaves are coated.
Notes
How much chard is a bunch?One bunch of young Swiss chard equals about 20 stems or 6 ounces, which again made about 4 cups of chopped chard.