Recently, I scored some inexpensive avocados and
cheap (pack of 6 for $1.25 @DollarTree)
English Muffins,
which all but required me to try them together.
They worked. :)
Final ready-to-eat grilled muffin with half an avocado:

I had immediately eaten the other (loaded) quarter muffin. :)
| Cost: | $0.46 | ($0.21 one muffin, $0.25 half an avocado) |
| Calories: | 260 | (120 muffin, 140 avocado (estimated - I don't know whether this was "large" or "medium")) |