
Global
Portobello Mushroom Burgers
A whole roasted portobello cap stands in for the patty. It's meaty, juicy and naturally low-calorie.
Ingredients
- 4 large portobello mushrooms
- 2 tbsp balsamic vinegar
- 1 tbsp olive oil
- 1 garlic clove, minced
- To serve: wholegrain buns, tomato, rocket, avocado
- Salt & pepper
Cooking Steps
Whisk the balsamic, olive oil, garlic and seasoning; brush over the mushrooms.
Marinate 15 minutes.
Grill or roast at 200°C (400°F) for 15 minutes, turning once.
Serve in wholegrain buns with avocado, tomato and rocket.
Optional Enhancements
- Add a slice of cheese
- Serve in a lettuce wrap
- Top with caramelised onions
Plant & Growing Tips
Garlic
- Plant individual cloves, pointed end up, in well-drained soil in full sun in autumn or early spring.
- Ensure consistent moisture during bulb development, but reduce watering as harvest approaches.
- Garlic grows well in containers at least 8 inches deep and wide.
Tomato
- Start seeds indoors 6-8 weeks before the last frost, then transplant seedlings into full sun after all danger of frost has passed.
- Provide sturdy support like stakes or cages as the plants grow to prevent sprawling and improve air circulation.
- Water deeply and consistently at the base of the plant to prevent blossom end rot.
Rocket
- Sow seeds directly into rich, well-drained soil in full sun to partial shade, spacing them about 6 inches apart.
- For a continuous supply, sow small batches every 2-3 weeks, especially in cooler weather.
- Rocket prefers cooler temperatures and may bolt (go to seed) quickly in hot summer conditions.
Natural Pest Control
- Hand-pick slugs and snails from rocket leaves in the morning or evening.
- Use row covers to protect young rocket plants from flea beetles, which chew small holes in leaves.
- Inspect tomato plants regularly for aphids and spray them off with a strong jet of water or use insecticidal soap.
Harvest
Garlic
- Harvest when the lower leaves begin to yellow and dry, but there are still 4-5 green leaves remaining.
- Carefully loosen the soil around the bulb with a fork and pull the garlic gently to avoid bruising.
Tomato
- Pick tomatoes when they are fully colored, firm, and easily detach from the vine with a slight twist.
- If frost is expected, green tomatoes can be picked and ripened indoors at room temperature.
Rocket
- Harvest outer leaves as needed for a cut-and-come-again supply, or cut the whole plant an inch above the soil for a quick regrowth.
- Pick leaves when they are young and tender for the best flavor, as older leaves can become more bitter.
Storing & Freezing
Best fresh; marinated caps keep 1 day raw.











