Regulars at Jimbo’s Roast Beef Seafood & Pizza debate the merits of horseradish sauce vs. barbecue sauce on the roast beef sandwich ($4.50 for a junior, $5.50 for large, and $6.50 for super). We liked it with both. Purists wonder whether lettuce and cheese have a place on the sandwich, but this, of course, comes down to personal preference. Everyone comes here for the pink, meltingly tender meat, piled high on a squishy bun, however they garnish it. Jimbo’s Roast Beef Seafood & Pizza, 40 Bow St., Somerville, 617-623-9068, www.jimbosroastbeefsomerville.com.