Processed cheese slice

One serving of Processed cheese slice — 1 slice (20 g) — comes to 61 kcal, 4 g protein, 0 g carbs and 5 g fat. Scaled to 100 g it works out to 305 kcal and 20 g protein, which makes it dense in protein for a dairy item. That single serving is about 4.1% of a 1,500 kcal day and 3.1% of a 2,000 kcal day, so it's more of a filler than a target-hitter on protein without much extra planning.

Walking off Processed cheese slice takes roughly 1,525 steps, using the rough approximation of 0.04 kcal burned per step (a population-average estimate for a moderate walking pace, not a personalised number). At ₹10 a serving it costs about ₹50 for every 20 g of protein it delivers, which is a mid-to-high price for protein compared with dal, eggs or soya chunks. It fits nearly every Indian diet type, including vegetarian, Jain, eggetarian. It works at breakfast and the evening snack slot. It's a packaged/processed item, worth checking the label against this estimate.

If you want variety without changing the macros much, the closest swaps in the dairy category are Butter, Chaas / buttermilk (salted, thin), Curd / dahi (toned milk), Curd, home-set from full cream milk — each keeps a similar role on the plate while shifting the exact protein-to-carb balance a little.