This vegan side dish is traditionally served at room temperature with grilled meat or fish, but feel free to double your portion and eat it as a vegan entree with crusty bread for dipping in that garlicky, flavor-packed olive oil. The name for this combination of roasted vegetables comes from the Catalan escalivar, meaning to cook in ashes, though most folks these days use an oven or grill to put some char on their veggies.
The trick here is not only to avoid all obvious sources of carbohydrate (sweets, bread, spaghetti, rice, potatoes), but also to be careful with your protein intake. If you eat large amounts of meat, eggs and the like, the excess protein will be converted into glucose in your body. Large amounts of protein can also raise your insulin levels somewhat. This compromises optimal ketosis.