Have your winter salads of greens and more greens gotten so dull that you’ve stooped to buying tasteless hot-house tomatoes just to add a little color to your plate? Help is on the way. Tomatomania!

Tomatoes are the tangy titans of late July and early August, from fresh-off-the-vine salads, to thick slices topping just-barbecued burgers, to oversized heirlooms simply adorned with basil leaves, ...