Tofu and Red Grape Kebabs

Name: Tofu and Red Grape Kebabs
Ingredients: ½ cup tahini; 1 tablespoon grated ginger; 1 tablespoon powdered coriander seeds; 1 teaspoon red cayenne pepper; ½ teaspoon fennel seeds (powdered); 1 teaspoon cumin seeds (powdered); ½ teaspoon freshly grated nutmeg; 1 tablespoon dried fenugreek leaves (optional); Salt to taste; 2 limes; ¼ cup plus 2 tablespoons pure dark maple syrup; 10 – 12 ounces extra firm tofu; 1 tablespoon fresh chopped thyme leaves; 25 to 30 red grapes; 2 tablespoons olive oil for cooking; 1 red onion, sliced; Chopped Chives to garnish