It's difficult to give an exact estimate of the amount of food that could be produced from a 10-meter by 5-meter vegetable garden because there are many factors that can affect yields, such as the quality of the soil, weather conditions, and the level of care and maintenance provided to the garden. However, we can provide a rough estimate based on average yields and some assumptions.

Assuming that the garden is well-maintained and the crops are planted and harvested at their optimal times, here is a rough estimate of the amount of food that could be produced from a 10-meter by 5-meter vegetable garden:

- Spinach: Assuming 2-3 plants per square foot and multiple plantings, you could expect to harvest around 50-75 pounds of spinach over the course of the year.
- Leeks: Assuming 4-6 plants per square foot and one planting, you could expect to harvest around 10-15 pounds of leeks.
- Brussels Sprouts: Assuming 1 plant per square foot and one planting, you could expect to harvest around 25-30 pounds of Brussels sprouts.
- Broad beans: Assuming 1 plant per square foot and multiple plantings, you could expect to harvest around 30-40 pounds of broad beans.
- Carrots: Assuming 16 plants per square foot and multiple plantings, you could expect to harvest around 50-60 pounds of carrots.
- Parsnips: Assuming 16 plants per square foot and one planting, you could expect to harvest around 10-15 pounds of parsnips.
- Onions: Assuming 16 plants per square foot and multiple plantings, you could expect to harvest around 30-40 pounds of onions.
- Potatoes: Assuming 1 plant per square foot and one planting, you could expect to harvest around 75-100 pounds of potatoes.
- Broccoli: Assuming 1 plant per square foot and multiple plantings, you could expect to harvest around 20-25 pounds of broccoli.
- Beets: Assuming 16 plants per square foot and multiple plantings, you could expect to harvest around 25-30 pounds of beets.
- Cabbage: Assuming 1 plant per square foot and multiple plantings, you could expect to harvest around 25-30 pounds of cabbage.
- Sweet corn: Assuming 1 plant per square foot and multiple plantings, you could expect to harvest around 30-40 ears of corn.

This is just a rough estimate and your actual yields could vary depending on many factors. Additionally, the amount of food produced will depend on your ability to properly store and preserve the produce after harvesting.
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