spaghetti with swiss chard and garlic chips

INGREDIENTS

• 1/3 cup extra-virgin olive oil
• 1 head garlic, cloves peeled and thinly sliced lengthwise though I am sure crosswise would work as well
• 1 medium onion, finely chopped
• 1/2 cup dried currants (we skipped this)
• 2 pounds green Swiss chard, stems and center ribs finely chopped and leaves coarsely chopped separately
• 1/2 cup water
• 1 pound spaghetti
• 1/2 cup Kalamata olives, cut into slivers
• 6 ounces feta, crumbled (1 1/2 cups)