Heat oil in a large heavy pot over medium-high heat. Add squash, onion and parsnips; cook, stirring occasionally, until starting to soften, about 5 minutes. Add garlic, ginger, turmeric, cumin and salt; cook, stirring constantly, until fragrant, about 1 minute.
Step 2
Add broth and tomatoes; bring to a boil. Reduce heat to medium; simmer until the vegetables are tender, 8 to 10 minutes. Add chard and chickpeas; cook, stirring occasionally, until the chard is bright green and starting to soften, about 2 minutes.
Step 3
Remove from heat; stir in vinegar. Sprinkle with parsley and serve immediately.