Grilled Smoked Sausage With Marinated Grilled Vegetables

• 4 smoked sausages
• 1 leek in quarters (cut)
• 1 squash (yellow)
• 950 ml chicken broth
• 475 ml wine vinegar (red)
• 475 ml extra-virgin olive oil
• 14 gr corn starch
• 2 gr oregano (chopped fresh)
• 2 gr thyme (chopped fresh)
• 1 gr salt