Start the morning with coffee and something baked in Brunnsparken. Take lunch at a table by the main square, or drive twenty minutes to a coastal restaurant where the archipelago sits just beyond the window. End the evening at a pub in the town centre or a pizzeria that has been making serious pizza long enough to be confident about it.
Food in Ronneby follows the same logic as the rest of the destination - unhurried, local and rather better than you were necessarily expecting.
Between those points, there are farm shops where the cheese was made that morning, a dairy in the town centre producing its own grilling cheese, a sushi restaurant by the square and an Indian restaurant beside the cinema. Ronneby is not a large town. Its food offer is considerably larger than its size suggests.