A sandwich, salad or burger at La Grande Orange will set you back $8 to $14 — not exactly unusual for a Santa Monica lunch spot. But then there’s that $9 bag of giant house-made sourdough English muffins that you won’t be able to bike home without. The bargain hunter’s solution? The “cheap egg salad sandwich” (you will have to hunt — the sandwich is curiously listed under “omelets & eggs” not “sandwiches” on the menu).  It’s an old-school, chunky egg affair dressed up with plenty of mayo and served on sturdy slices of whole wheat toast with lettuce. This isn’t some brilliant new farmers’ market combo of eggs and the produce du jour, but if you’re a classic egg salad fan, it is satisfying and fresh. And at $4.95, you can still afford a bag of English muffins to toast up for breakfast tomorrow.