(chocolate-covered raisins, fig bars, fruit pies, pumpkin pie, carrot cake). Some food products derived from fruit and vegetables may not retain the nutritive value. What Greek Fruits, Vegetables and Herbs Are in Season Now? Come July, okra, summer squash, figs, nectarines and peaches reach their. Acid Content of Fruits and Vegetables for Home Canning and Preserving adding 2 tablespoons of lemon juice to each quart of tomatoes or tomato products. Properly acidified tomatoes and figs are acid foods and can be safely processed in.